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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Compute K-fn of a Point Pattern</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for Kfn {spatial}"><tr><td>Kfn {spatial}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Compute K-fn of a Point Pattern </h2> <h3>Description</h3> <p>Actually computes <i>L = sqrt(K/pi)</i>. </p> <h3>Usage</h3> <pre> Kfn(pp, fs, k=100) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>pp</code></td> <td> <p>a list such as a pp object, including components <code>x</code> and <code>y</code> </p> </td></tr> <tr valign="top"><td><code>fs</code></td> <td> <p>full scale of the plot </p> </td></tr> <tr valign="top"><td><code>k</code></td> <td> <p>number of regularly spaced distances in (0, <code>fs</code>) </p> </td></tr></table> <h3>Details</h3> <p>relies on the domain D having been set by <code>ppinit</code> or <code>ppregion</code>. </p> <h3>Value</h3> <p>A list with components </p> <table summary="R valueblock"> <tr valign="top"><td><code>x</code></td> <td> <p>vector of distances </p> </td></tr> <tr valign="top"><td><code>y</code></td> <td> <p>vector of L-fn values </p> </td></tr> <tr valign="top"><td><code>k</code></td> <td> <p>number of distances returned – may be less than <code>k</code> if <code>fs</code> is too large </p> </td></tr> <tr valign="top"><td><code>dmin</code></td> <td> <p>minimum distance between pair of points </p> </td></tr> <tr valign="top"><td><code>lm</code></td> <td> <p>maximum deviation from L(t) = t </p> </td></tr></table> <h3>References</h3> <p>Ripley, B. D. (1981) <em>Spatial Statistics.</em> Wiley. </p> <p>Venables, W. N. and Ripley, B. D. (2002) <em>Modern Applied Statistics with S.</em> Fourth edition. Springer. </p> <h3>See Also</h3> <p><code><a href="ppinit.html">ppinit</a></code>, <code><a href="ppregion.html">ppregion</a></code>, <code><a href="Kaver.html">Kaver</a></code>, <code><a href="Kenvl.html">Kenvl</a></code> </p> <h3>Examples</h3> <pre> towns <- ppinit("towns.dat") par(pty="s") plot(Kfn(towns, 10), type="s", xlab="distance", ylab="L(t)") </pre> <hr /><div style="text-align: center;">[Package <em>spatial</em> version 7.3-11 <a href="00Index.html">Index</a>]</div> </body></html>